Spark-arrester



(No Model.) 2 Sheets-Sheet 1.

E. M. LUOKETT.

SPARK ARRESTER.

No. 898,994. Patented Dec. 4, 1888.

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2 Sheets-Sheet 2.

(No Model.)

B. M. LUCKETT.

SPARK ARRESTER.

No. 398,994. Patented Dec. 4, 1888.

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UNITED STATES PATENT QEE QE.

EDGAR MELVILLE LECKETT, ()F SACRAMENTO, CALIFORNIA.

SPARK-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 393,994, dated December4, 1888.

Application filed May 31, 1888. Se1ia1N0.275,628. (N0 model.)

To all whom it may concern:

Be it known that I, EDGAR MELVILLE LUCK- ETT, of the city oi.Sacramento, Sacramento county, State of California, have invented anImprovement in Spark-Arresters; and I hereby declare the following to bea full, clear, and exact description of the same.

M y invention relates to an improved means for arresting sparks inlocomotive-engines; and it consists in the application of a hingedadjustable deflecting plate and a supple mental netting, in conjunctionwith horizontal netting within the extension front or smoke-box of theboiler.

Referring to the accompanying drawings, Figure 1 is a side elevation invertical section, showing the coi'lstruction of my device. Fig. 2 is atransverse vertical section taken through the GXtGllSlOlhflOlll].

A the front tube-sheet of the boiler of the engine, and B are the tubesthrough which the products of combustion are discharged from thetire-box, which is at the rear end of the boiler, and maybe of any usualor well-known pattern.

C is the extensio11t'ront of the boiler, into which the products ofcombustion are discharged.

D are the pipes through which steam passes to the engine-cylinder, (nothere shown,) and E is a vertical exhaust-pipe through which the steam isejected into the chimney or stack E, which stands in line directly abovethe mouth of the exhaust-pipe. This pipe has a contracted nozzle, andthe violent discharge of steam through this nozzle produces the strongintermittent draft which is necessary to produce the proper combustionfor locomotives, this being the usual method.

In order to arrest the small cinders and sparks which are liable to bethrown out by this strong draft, various spark-arrestingdevices havebeen employed, including netting, deflectors, &c.

In my invention I employ the combination of a supplemental cylindricalnetting with the ordinary horizontal netting, and also of a hingedadjustable deflector depending-in front of the tube-sheet.

G is a netting which. extends from the front tube-sheet to the front endof the extension smoke-box, this netting being perforated, so that theexhaust-pipe E passes up through it. This netting is depressed, so thatit inclines downward from the tube-sheet to the exhaust pipe E, andthence rises again to its point of attachment at the front of theextension. This netting will arrest and throw down to the bottom of theextension a large portion of the cinders and. sparks which are drawn outby the violent exhaust, and those sparks and cinders are deposited inthe cindewbox H, which extends below the front end of the extension, andis provided with a gate, I, through which they may be discharged fromtime to time.

Above the netting G is a second or supple mental i'ietting, .l, which inthe present case I have shown as cylimlrical, havin the lower endfitting closely around the end of the exhaust-pipc, which is above thehorizontal netting. The upper end of the netting .I extends up in to thelower part of the stack F, to which it is secured. Any sparks or cinderswhich may pass through the horizontal netting will have lost so much oftheir force that they will be almost entirely arrested by thissupplemental netting.

K is a deflecting-plate, having its upper edge secured to a hinged orrotary shaft, L, which extends out through the sides of the extension,and has a lever-arm, ill, attached to it, from which a connecting-rodmay extend to a point where it will be within easy reach of theengineer.

The plate K acts to throw the sparks and the cinders downward to thebottom of the extension, and as they pass to the front they may fallinto the cinder-box, so as not to be thrown up or agitated by the draft.

I am aware that a horizontal netting has been used in conjunction withthe cylindrical netting surrounding the upper end of the exhaust-pipe;but in this case the exhaustpipe terminated below the horizontalnetting, and the cylindrical netting was the only one which served toarrest the sparks at thatpoint. In my invention the horizontal nettingacts first, and the exlmust-pipe extending up through it and beingsurrounded by the cylindrical netting the latter acts supplementary tothe horizontal one, thus profixed in the smoke-box extension above the Iplane of the boiler-tubes, the steam-exhaust nozzle passing upwardthrough said netting and discharging into the stack, in combina tionwith the supplemental netting, having its upper end secured within thestack and its lower end surrounding the exhaust-nozzle above thehorizontal netting, substantially as herein described.

3. A spark-arrester for locomotives, consisting of the smoke-boxextension in front of the boiler, a sub-treasury or cinder-box openingfrom the front lower portion of said extension, and an adjustabledeflecting-plate ,suspen ded within the smoke-box in front of thetube-sheet, a netting extending across the smoke-box above thehorizontal plane of the tubes, through which netting the exhaustpipeextends upwardly, and asuppleinentary netting surrounding the upper endof the exhaust-pipe, having its lower end inclosing and closely fittingthe exhaust-nozzle above the horizontal netting, and its upper endsecured with-in the interior of the smoke-stack, substanti ally asherein described.

In witness whereof I have hereunto set my hand.

EDGAR MELVILLE LUCKETT.

\Vitnesses:

JAS. N. PORTER, J. W. SHEPHERD.

